Charging base



FIG. 1 is a perspective view of our new charging base;

FIG. 2 is a top view of our new charging base of FIG. 1;

FIG. 3 is a side view of our new charging base of FIG. 1, the opposite side view being a mirror image thereof;

FIG. 4 is another side view of our new charging base of FIG. 1;

FIG. 5 is a side view of our new charging base, opposite that of FIG. 4; and,

FIG. 6 is a bottom view of our new charging base.

The broken lines are shown for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a charging base, as shown and described. 